K 10
svn:author
V 7
attilio
K 8
svn:date
V 27
2012-12-25T16:36:38.901384Z
K 7
svn:log
V 689
Generalize the prefetch concept into an MI interface.
Apparently (given the ofed support) Linux has already a similar
interface, which doesn't take into account all the cache levels and
purpose.

Cache levels are meaningful also in x86 case and will certainly be
even more in embedded world, thus I think it is important to specify
those.

Unofficial doc seems to say that __builtin_prefetch() was added in
gcc 3.0 but I couldn't find any official documentation stating that.

- Maybe we need doc for the PRFTCH_* flags?
- Maybe we want to retain compat with Linux but having underoptimized
  behaviour?
- Why we don't use __clang__ checks __has_builtin() proficiently?

Requested by:	alc

END